@lain I think the difference is that people are forced to install and use tax software. Whether the NSA uses "freeSPY+", or "proprietarySPY" won't affect most people.
@lain >What about the software the NSA uses to spy on people? They most likely wrote their spying software themselves and/or paid an outside contractor to develop part of it, but hand over the copyright and the source code - if that's the case, then such software is free.
If such software is free, it respects the NSA's freedom, but nobody else gets any freedom, as the NSA uses that software to attack the citizens of the USA and most countries on earth.
Such topics are really out of scope of the aims of the FSF, but they do point out bad things that the NSA does on gnu.org, but not to the point that scope creep ruins everything.